1
Section 61150279L1-5, Issue 1
61150279L1-5A
1. GENERAL
This practice provides installation and maintenance
procedures for the ADTRAN BR1/10 E1 LIU.
Figure␣ 1
is an illustration of the BR1/10 E1 LIU.
Revision History
This is the initial release of this document. Future
revisions will be described in this subsection.
Features
The BR1/10 E1 LIU (E1 LIU), part number
1150279L1, includes the following features:
• Common Channel Signal (CCS) framing formats.
• AMI and HBD3 Line Coding.
• Local and remote loopback for E1 interface.
• BRI test access control. (U-BR1TE mode only)
• Front panel bantam jack for DS0 logic tester
access. (U-BR1TE mode only)
• Front panel DB-9 for DS0 logic tester clock
input. (U-BR1TE mode only)
Section 61150279L1-5A
Issue 1, March 2000
CLEI Code # N/A
BR1/10 E1 LIU
BR1/10 E1 Line Interface Unit
Installation and Maintenance
General Description
The E1 LIU is a common module plug-in unit used in
the ADTRAN BR1/10 channel bank as the interface
between the channel bank and the E1 line. The BR1/
10 can be used in Frame Relay Multiplex
configurations to support multiple applications. The
BR1/10 functions as an ISDN channel bank and
provides 10 standard 2B+D subscriber lines. In the
Frame Relay Multiplex configuration, the BR1/10
functions as a statistical multiplexer, concentrating up
to 10 high speed SDSL subscriber lines into a single
E1 carrier facility.
The E1 LIU provides data formatting, line encoding,
and timing recovery and generation for BRI and E1
transmission. Two 10-position rotary switches allow
for selection of BRI tests, a dual bantam jack provides
test access, and a DB-9 furnishes both an 8 kHz and a
64 kHz clock for the DS0 logic test set. Option
selections for E1 LIU functions are selected using the
DIP switch on the associated BR1/10 E1 BCU.
The BR1/10 can be used with the ADTRAN
FramePort products to deliver IDSL and SDSL
Trademarks: Any brand names and product names included in this document are
trademarks, registered trademarks, or trade names of their respective holders.
Figure 1. BR1/10 E1 LIU
5
4
3
2
1
9
8
7
6
ADR3
ADR2
AD
R1
NT1
LPTX
LPBX
AD
R6
AD
R5
ADR4
10
CRTX
T
E
S
T
IN
T
E
S
T
OUT
E1 LIU
1150279L1
CONTENTS
1. GENERAL ............................................................ 1
2. INSTALLATION .................................................. 2
3. TESTING .............................................................. 3
4. SPECIFICATIONS ............................................... 6
5. MAINTENANCE .................................................. 6
6. WARRANTY AND CUSTOMER SERVICE ...... 6
FIGURES
Figure 1. BR1/10 E1 LIU .......................................... 1
Figure 2. BR1/10 E1 LIU and BCU .......................... 3
Figure 3. DB-9 Connector ......................................... 3
TABLES
Table 1. Rotary Test Switch Options ........................ 3
Table 2. E1 BCU Test DIP Switch ............................ 4
Table 3. BR1/10 E1 LIU Specifications ................... 6
